MCAT Question of the Day


  • Q:

    In skeletal muscle contraction, which of the following provides the most important source of calcium ions?

     

    A

    Triphosphate binding to a receptor on the sarcoplasmic reticulum membrane.

    B

    The opening of calcium channels in the sarcoplasmic reticulum.

    C

    The calcium ATPase in the sarcoplasm.

    D

    Voltage-gated calcium channels in the muscle fiber plasma membrane.



    Protein Structure and Function | Musculoskeletal System | Membrane Transport and Signalling |
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